<ul class="ui-grid-trisect">
    <li>
        <div class="ui-grid-trisect-img">
            <span style="background-image:url(../../pic/index/function_pic1.jpg)" aria-label="功能特权1" role="img">
            </span>
        </div>
    </li>
    <li>
        <div class="ui-grid-trisect-img">
            <span style="background-image:url(../../pic/index/function_pic2.jpg)" aria-label="功能特权2" role="img">
            </span>
        </div>
    </li>
    <li>
        <div class="ui-grid-trisect-img">
            <span style="background-image:url(../../pic/index/function_pic3.jpg)" aria-label="功能特权3" role="img">
            </span>
        </div>
    </li>
</ul>